Old bridge pilings/debris might be out there, too. I know some of the older bridges over the upper Missouri River were dynamited after replacements were built.The same practice may have been used on the Mississippi.
Right! The point that I was trying to make was that the debris on the bottom of the main arterial waterway in the USA is man made.
The indirect point is that the damn bigger government hue and cry is to turn a bad NATURAL situation into an excuse to spend more of OUR tax dollars on something that they are lying about.
‘Never let a crisis go by without trying to further Bankrupt American taxpayers.’